Get final blows with Malfeasance, Witherhoard, Touch of Malice, Whisper of the Worm, Xenophage, or Arbalest.
You've agreed to help the Drifter with tactical defense of the City. This time, he's asked you for weapon telemetry from final blows using these weapons: Malfeasance, Witherhoard, Touch of Malice, Whisper of the Worm, Xenophage, or Arbalest.